The brakes on the technological singularity will be patents and incompatibility. When things get so quick and easy for everyone to do, nothing is standard any more, because anybody could have made it according to their own whims. If you can't rely on gadget X being compatible with gadget Y, then you can't make gadget XY+, a fusion of the two that makes them more useful together than they were apart. Instead, you have to start from scratch, and the more people are making more components, the less likely it is that component A will work with component B. It's going to be an especially big problem if separate methods of interaction or different cable and plug designs are patented, because then they will be working explicitly against getting gadgets and components to interact.
Mokalus of Borg
PS - So when technology production speeds up, compatibility suffers.
PPS - And incompatibility slows down technology production.